I have an app that’s running on an app platform server. It has worked fine for the past 3 months, but all of a sudden it cannot be accessed when using some DNS services. The majority of people who need it can access it, but some users couldn’t. It kept returning net::ERR_CONNECTION_REFUSED whenever a request was sent. When they changed their DNS service to google public they were able to access it. This makes me think it’s a problem with the dynamic IP syncing across DNS services. I don’t have a very good understanding of how dynamic IP addresses or DNS services work. The server currently uses the default domain given by digitalocean.
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